<!doctype html>
<html>
<head>
    <meta charset="gbk"/>
    <meta name="viewport"
          content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-touch-fullscreen" content="yes">  
    <style>
        .test{
            border:2px solid green;
            width:300px;
            height:350px;
            background: #000;
            position: relative;
            COLOR:#FFF;
        }
        .test #ball{
            width:12px;
            height:12px;
            background: #fff;
            -webkit-border-radius:6px;
            position: absolute;
            left:0;
            right: 0;
        }
    </style>
</head>
<body>

<h2>设备方向感应测试</h2>
<div id="msg"></div>

<div id='test' tabindex='0' class="test">
    <!--<img src="img/3.png" id="ball">-->
    <div id="ball"></div>
</div>

<!-- <img src="http://img01.taobaocdn.com/tps/i1/T15zFIXxJaXXbIZMjj-180-70.png" id="imgLogo" alt="">
<img src="http://img01.taobaocdn.com/tps/i1/T15zFIXxJaXXbIZMjj-180-70.png" id="imgLogo2" alt=""> -->

<script>
    function Orientation(selector){}
    Orientation.prototype.init = function(){
        window.addEventListener('deviceorientation', this.oriListener, false);
        window.addEventListener('MozOrientation', this.oriListener, false); //为firefox所用
        window.addEventListener('devicemotion', this.oriListener, false);   //重力感应
    }

    Orientation.prototype.oriListener = function(e) {
        setTimeout(function(){
            handler(e);
            deviceMotionHandler(e)
        },10);

        function handler(e){
            // For FF3.6+
            if (!e.gamma && !e.beta) {
                // angle=radian*180.0/PI 在firefox中x和y是弧度值,
                e.gamma = (e.x * (180 / Math.PI)); //转换成角度值,
                e.beta = (e.y * (180 / Math.PI)); //转换成角度值
                e.alpha = (e.z * (180 / Math.PI)); //转换成角度值
            }
            /* beta:  -180..180 (rotation around x axis) */
            /* gamma:  -90..90  (rotation around y axis) */
            /* alpha:    0..360 (rotation around z axis) (-180..180) */

            var gamma = e.gamma
            var beta = e.beta
            var alpha = e.alpha

            if(e.accelerationIncludingGravity){
                // window.removeEventListener('deviceorientation', this.orientationListener, false);
                gamma = e.accelerationIncludingGravity.x*300
                beta = -e.accelerationIncludingGravity.y*300
                alpha = event.accelerationIncludingGravity.z*300
            }

            if (this._lastGamma != gamma || this._lastBeta != beta) {
                document.querySelector("#msg").innerHTML = "x: "+ beta.toFixed(2) + " y: " + gamma.toFixed(2) + " z: " + (alpha != null?alpha.toFixed(2):0)


                var style = document.querySelector("#ball").style;
                style.left = gamma/90 * 200 + 150 +"px";
                style.top = beta/90 * 200 + 100 +"px";


                this._lastGamma = gamma;
                this._lastBeta = beta;
            }
        }

        function deviceMotionHandler(e) {
            /*
            if(e.accelerationIncludingGravity){
                var gx = e.accelerationIncludingGravity.x;
                var gy = e.accelerationIncludingGravity.y;
                var gz = e.accelerationIncludingGravity.z;
            }
             var facingUp = -1;
             if (gz > 0) {
             facingUp = +1;
             }
             var tiltLR = Math.round(((gx) / 9.81) * -90);
             var tiltFB = Math.round(((gy + 9.81) / 9.81) * 90 * facingUp);

             //document.getElementById("moCalcTiltLR").innerHTML = tiltLR;
             // document.getElementById("moCalcTiltFB").innerHTML = tiltFB;

             var rotation = "rotate(" + tiltLR + "deg) rotate3d(1,0,0, " + (tiltFB) + "deg)";
             document.getElementById("imgLogo").style.webkitTransform = rotation;
           */

            var gamma = e.gamma
            var beta = e.beta
            var alpha = e.alpha

            var tiltLR =gamma; //Math.round(((beta) / 9) * -90);
            var tiltFB = beta;

            var rotation = "rotate(" + tiltLR + "deg)";
            var rotation2 = "rotate(" + tiltFB + "deg)";
            var style = document.querySelector("#imgLogo").style;
            var style2 = document.querySelector("#imgLogo2").style;
            style.webkitTransform = rotation;
            style2.webkitTransform = rotation2;
        }
    };

    (new Orientation()).init();
</script>
</body>
</html>
